Here's a duck I saw near my parents house in Orange Park, FL. It was in a neighborhood pond, and while I was in town, I saw mallards, muscovys, and mottled ducks in area. The other thing is that the female this drake was with had the same white patch around its eye.

I know that mottled ducks are related to and commonly mate with mallards, but I would expect something much more mottled-like than this picture. Until I hear to the contrary, I'm going to assume it's some type of mallard-muscovy terminator duck!!!

^i think bdub got it. looks like a mallard/woodie. eyepatch is woody, along with the bill is mallard in length but colored like a woodie and it begins to mutate towards the base of the bill. the way the wings sit elongated towards the tail feathers definitely looks woodie to me. either way, SMOKE IT before it interbreeds. HAPPY SHOOTING